Figure 1

Cre-inducible expression of EWSR1-FLI1 drives small round blue cell tumor (SRBCT) development in zebrafish.

(A) Overview of experimental method. The Tol2 transposon system was used to integrate human EWSR1-FLI1 into the wild-type zebrafish genome by microinjection into single-cell-stage embryos. (enhanced Green Fluorescent Protein) eGFP-positive fish were monitored up to 4 months. (B) Constructs for Cre-inducible expression of EWSR1-FLI1. (C) Incidence of eGFP+ tumors detected in Ubi:RSG-EWSR1-FLI1; Cre RNA (n = 77) injected zebrafish versus Ubi:RSG-EWSR1-FLI1; eGFP RNA (n = 142) and uninjected controls (N = 150) in a wild-type genetic background (p < 0.001 by log-rank test). (D) Representative images of eGFP-positive tumors in zebrafish (top panel) and H&E staining of tumor sections (bottom panel): (I) SRBCT with diffuse skeletal muscle infiltration and (II) visceral SRBCT arising from fin dorsal radial bone. Scale bars, 100 μm. (E) Percent tumor incidence at different anatomic sites.

Expression Data

Expression Detail
Antibody Labeling
Phenotype Data

Phenotype Detail
Acknowledgments
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